psychopathology vs defense reaction

psychopathology and defense reaction both are nouns.

Word	Noun	Adjective	Verb	Adverb
psychopathology	Yes	No	No	No
defense reaction	Yes	No	No	No

psychopathology (noun)	defense reaction (noun)
the branch of medicine dealing with the diagnosis and treatment of mental disorders	(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires
the branch of psychology concerned with abnormal behavior